Yes Fred, the car runs exactly like my friend's 97 S320 when he had a failing coil pack. However, his coil configuration was quite different (one coil pack for every 2 cylinders), so for some reason I was not thinking in that direction. Of course, my 300E has one coil that serves all cylinders. Looks like I can buy a new one for about $80, but is there any test I can do to confirm this before I go throw another part at it? If the coil was bad, would it run at all? Keep in mind it runs, but with a severe miss or engine vibration.

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Treiberg's Collection: 1981 240D, 1985 300SD, 1992 300E, 1997 E300D, 2005 C230K